renderObjectWithTwig example

  protected static $modules = [
    'language',
  ];

  /** * @dataProvider providerTestMarkupInterfaceEmpty */
  public function testMarkupInterfaceEmpty($expected, $variable) {
    $this->assertSame($expected, (string) $this->renderObjectWithTwig($variable));
  }

  /** * Provide test examples. */
  public function providerTestMarkupInterfaceEmpty() {
    return [
      // The first argument to \Drupal\Core\StringTranslation\TranslatableMarkup       // is not supposed to be an empty string.       // phpcs:ignore Drupal.Semantics.FunctionT.EmptyString       'empty TranslatableMarkup' => ['', new TranslatableMarkup('')],